Question
Question: If the pressure in a closed vessel is reduced by drawing out some gas, the mean free path of the mol...
If the pressure in a closed vessel is reduced by drawing out some gas, the mean free path of the molecules
A
Is decreased
B
Is increased
C
Remains unchanged
D
Increases or decreases according to the nature of the gas
Answer
Is increased
Explanation
Solution
The distance travelled by a molecule in two consecutive collisions is called free path. If pressure is reduced, a molecule will travel longer distance before collision, so mean free path is increased.